Dear FSL user.
I have a question about "anistropy to constrain tracking".
Use anisotropy to constrain tracking:
Use this option if you want the fractional anisotropic volumes to influence the
tractography.
The tracts stop if the anisotropy is lower than a random variable
between 0 (low anisotropy) and 1 (high anisotropy).
Why is the threshold decided by not a fixed value but random numbers?
What is the advantage?
I would like to reconstruction white matter pathways, but,
if the value of random number is large, the tracking will stop in spite of areas
of high anisotropy (white matter).
Or if the value of random number is very small, the tracking will not stop in
spite of areas low anisotropy (gray matter).
Thanks
Kenji.
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